package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;

import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import lombok.extern.slf4j.Slf4j;

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;


import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    /**
     * @Author: ggm
     * @date: 2024/11/27
     * @Description: 发送验证码
     */
    @Override
    public Result sendCode(String phone, HttpSession session) {
        //判断手机号是否符合规范
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号不符合规范,请重新输入");
        }
        //生成验证码
        String code = RandomUtil.randomString(6);
        //保存验证码到redis中
        /*session.setAttribute("code", code);*/
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone, code, LOGIN_CODE_TTL, TimeUnit.MINUTES);

        //TODO 发送验证码
        log.info("发送验证码成功,验证码为{}", code);

        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        // 1.校验手机号
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)) {
            // 2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误！");
        }
        // 3.校验验证码
        /* Object cacheCode = session.getAttribute("code");*/
        //从redis中获取验证码
        String redisCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        String code = loginForm.getCode();
        if (redisCode == null || !redisCode.equals(code)) {
            //3.不一致，报错
            return Result.fail("验证码错误");
        }
        //一致，根据手机号查询用户
        User user = query().eq("phone", phone).one();

        //5.判断用户是否存在
        if (user == null) {
            //不存在，则创建
            user = createUserWithPhone(phone);
        }
        //7.保存用户信息到redis中
        //session.setAttribute("user", BeanUtil.copyProperties(user, UserDTO.class));
        //使用token作为key存储用户信息
        //随机生成token
        String token = UUID.randomUUID().toString(true);
        /*UserDTO userDTO = new UserDTO();
        BeanUtil.copyProperties(user, userDTO);*/
        //将user转化为UserDTO
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        //将UserDTO转换为map
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(), CopyOptions.create()
                .setIgnoreNullValue(true).setFieldValueEditor((firedName,fieldValue)-> fieldValue.toString()));
        //将map存储到redis中
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY+token,userMap);
        //设置token有效期
        stringRedisTemplate.expire(LOGIN_USER_KEY+token, LOGIN_USER_TTL, TimeUnit.MINUTES);
        //返回token
        return Result.ok(token);
    }

    private User createUserWithPhone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName(SystemConstants.USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
